Give full permission to the user that run the services of the McAfee agent to the following folders:1. On the folder that hold the McAfee Update,(Configure via policy)
2. On the Folder:
C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys

- System disappearing from ePO- System re registering in ePO- System reappear in Lost&found

one of the scenarios is happening while the systems are connection via VPN.

What is happening:

You encounter this problem only when the first connection from a client to the ePO server takes place over a VPN connection. If the computer's first connection is via a Local Area Network (LAN), the correct Media Access Control (MAC) address is added to the table.

When a computer communicates with the ePO server via VPN, it uses the VPN virtual computer's MAC address and not its own actual MAC address. This VPN MAC address is usually the same for all computers connecting through the VPN.

This issue is not restricted only to VPN clients. Anything that could cause multiple computers to report the same MAC address can cause this problem. For example, if you clone a virtual machine and do not reset the MAC address, both computers report the same MAC address to ePO

Solutions:

You need to find the MAC address of the system while it is connecting via VPN​Go to ePO console -> System tree, find the system -> go to system information, click more, you see the VPN MAC address collected from the client.Copy to a note the MAC Address and split the first six digits of this MAC address, for example 012SHAY4350E.

Go to the database SQL of ePO server.

Run the following SQL command:

INSERT INTO ePOVirtualMacVendor (VendorID) values ('######')

(where: ###### is the first 6 digits of the VPN MAC address you copy already)

The following environmental requirements are necessary to successfully send an agent installation from the ePO 4.x or 5.x server to a client.

You must enable all of the following on the client and the Microsoft Windows networking environment:

Network protocols and ports required for machine name resolution

ADMIN$ share

File and Print sharing

Server service

Remote Registry service

The credentials used for the push (from the ePO server or remote Agent Handler) must have local administrative rights on the client. Additionally, you will need to disable User Account (UAC) in Windows to successfully push an agent from ePO.

ePO server failed to update master repository and available version is emptyError via http or FTP:Failed to download file catalog.z from site update.nai.com:80, error code 11004 ( The requested name is valid, but no data of the requested type was found. )

Solution:There is a problem with the network adapter of the ePO server.